8 1 6 4 50.0 50.0 50.0 50.0 -50.0 50.0 -50.0 -50.0 50.0 -50.0 50.0 50.0 50.0 50.0 -50.0 -50.0 50.0 -50.0 -50.0 -50.0 -50.0 50.0 -50.0 -50.0 1 2 3 4 5 6 7 8 2 8 7 3 1 5 6 4 3 7 6 4 1 2 8 5